Exhaust device for internal combustion engines



Jan. 12, 1943. A. F. DECKER EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINES Filed April 3, 1941 INVENTOR MM Y Pu TTORNEY Patented Jan. 12, 1943 EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINES Ammiel F. Decker, Pelham, N. Y.

Application April 3, 1941, Serial No. 386,675

12 Claims.

This invention relates to exhaust connections for internal combustion engines used in automobiles, airplanes, boats, or stationary installations, and more particularly to such exhaust connections that provide means for conditioning the exhaust gases from the engine.

One object of my invention is to provide means to change the chemical nature of the exhaust gases, whereby they are made safer to inhale and theodor is made less objectionable.

Another object is to mix the exhaust gases with air to change the carbon monoxide into harmless gases and thereby do away with the danger of inhaling carbon monoxide.

Another object is to reduce the back pressure on the engine and thereby reduce the gasolene consumption and increase the power of the motor.

Another object is to reduce condensation of the exhaust gases in the exhaust pipe and muiiier with consequent lessening of rusting of these parts.

Another object is to provide means for injecting air into the exhaust connection at an angle so that the cool air from the outside impinges upon the inner surface of the same, thereby cooling the exhaust connection and reducing, consequently, the temperature of the exhaust gases.

Another object is to provide a device of this kind which is simple in construction and inexpensive to manufacture. Another object is to provide a means for accomplishing the above advantages, which can be incorporated in the exhaust connection of the engines or applied thereto as an attachment for engines already constructed.

Other objects of this invention will appear in the following-description and claims:

Referring to the drawing:

Fig. 1 is a top view of my invention constructed as an attachment. 7

Fig. 2 is a side view of Fig. 1.

Fig. 3 is an end view of Fig. 1.

Fig. 4 is a section view throughl-l in Fig. 1.

tube, so that the air, entering the same, becomes compressed as it reaches the opposite end of the tapering tubes and its force is therefore greatly increased as it enters the device. When the vehicle is not in motion with the motor running, the exhaust gases passing through the device draw air into the same through the tapering side tubes. This operation has been found in practice to cause streams of air to strike the heated walls of the device, and cause the exhaust gases to partly condense and to become moist when finally expelled from the device. This moistened gas exhaust is heavier than air and therefore falls and injury or discomflture is materially lessened.

As the speed of the vehicle is increased the volume of exhaust gases increases and the amount of air intake through the tapering side tubes is also increased, by reason of the increased pressure of the outside air forcing the same through the side tubes at a speed proportional to the speed of the vehicle. Manifestly the expulsion speed of the exhaust gases is a vital factor in reducing the back pressure and therefore the amount of gasoline consumed. By obtaining a complete evacuation of the exhaust gases there is less opportunity for condensation within the exhaust system and the consequent resting of the parts.

The size of the tapering side tubes is determined by the ,size of the device itself and may be designed to suit various conditions found in practice.

At times I may attach an air pump to one or more of the side tubes to produce a forced air intake.

This invention is not limited to an attachment to be applied to the usual exhaust tube of an engine as manifestly all of the features thereof may be incorporated in the well known exhaust pipe used at the present time when it is being made.

It is obvious that the mixture is diluted by the air entering directly under pressure and that the elements of the air make a decided chemical change as they mix with the gas contents of the exhaust.

The device is constituted by a tubular body member I which is either an extension of the usual exhaust pipe of the engine, or as shown in the drawing, an attachment to be secured thereto by a clamp ring 2 surrounding the body at its forward end and supplied with a clamping screw 3. In order that the device can be clamped tight against the engine exhaust pipe, not shown,

. are at different distances from the end of the body thereby to increase the whirling action on the exhaust gases and reduce the carbon monoxide content by the more intimate mixture with the incoming air. There may be any number of these inlets and they may be arranged in various ways but I prefer to assemble them as shown in spiral relation, that is with one advanced ahead of the proximate one. The outer end of the inlet tubes I prefer to make approximately perpendicular to the side of the body I as shown. In order to secure the inlets 5 to the body I I may provide the outer end of the same with a lug 6 which passes through an opening in the body and is then bent back upon the-inside of the same to which it may be secured by spot welding or otherwise. There are many ways in which the inlets 5 may be secured to the body I all of which would come within the scope of this invention.

Between the air inlets and the rear end of the body I I provide an opening I therein, in one side of the body I. Along each side of the opening 1 I provide a bead 8. In the opening 1 I insert a container Fig. 5 in the form of a cylindrical slip cover bore to containa catalyst or gas modifying material. This container is constructed with a bead 9 on the top and bottom edges which hold discs of foraminous sheet metal or netting in through which the gases can pass freely thereby subjecting them to the influence of the material within the container. The head 9 enters the inside of the bead 8 when the container is inserted.

In order to detachably secure the container in the opening I, a spring I6 is riveted or otherwise fastened thereto. The spring I5 is provided with reflexed portions I! which engage with depressions i8 on the inside of the body I, where the container'is inserted therein. In order to easily remove the container the outer ends IQ of the spring l6 extend beyond the edges of the opening I and are bent over as shown in Fig. 4.

The rear or gas expulsion end of the body is deflected as shown to cause the gases to be exhausted downwardly toward the roadway and away from the car and rear bumper. On the deflected portion ll of body I, is mounted a finished plate 12 which may be secured thereto by rivets I3 and spaced therefrom forming a heat insulating space M to prevent the heat of the gases from tarnishing the finish of the plate l2. A reflector 15 may be assembled to the plate I2 if so desired.

At times when a forced inlet of air is desired a piped connection 20 can be made to one or more Having described my invention so that anyone skilled in the artto which it pertains can make and use the same, according to the statutes, what I claim as my invention and wish to secure by Letters Patent is:

1. An attachment for the exhaust tail pipe of an internal combustion engine or the like, comprising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body, the larger parts of said tubes extending outside of said body, for conducting air into the tubular body to mix with the exhaust gases.

2. An attachment for the exhaust pipe of automobile engines, comprising a tubular body member having a substantially straight central passage therethrough, means for attaching said body member to the end of the exhaust pipe, and a flaring air intake member mounted on the side wall of said tube having its larger end outside of said tube and facing in the direction of travel and its smaller end coacting with the tubular member, thereby to cause a whirling suction action on the exhaust gases.

3. A device adapted to be secured to the free outer end of an exhaust pipe of an automobile engine including a tubular body member having a substantially straight through central passage therethrough, a plurality of tapering air intake tubes penetrating the wall of said tubular member at spaced intervals thereabout, the larger ends of said tapering tubes facing in the direction of travel of the automobile the inner ends of said tubular intakes being arranged tangentially with respect to and within the tubular body member, the axis of said tubular intakes being oblique to the axis of the central passage.

4. A device as set forth in claim 3, in which the end of the tubular member is provided with a deflector.

5. A device as set forth in claim 2, in which there are a plurality of air intake members spaced about the body member and all tangentially inclined with respect to the length of the body member thereby to cause a whirling action of the exhaust gases as they leave the attachment.

6. In combination with the exhaust tail pipe of an internal combustion engine or the like, comprising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body, the larger parts of said tubes extending outside of said body for conducting air into the tubular body to mix with the exhaust gases, said body being provided with clamping means for securing the same to the end of the exhaust pipe.

7. In combination with the exhaust tail pipe of an internal combustion engine or the like, comprising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body,

- prising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body, the larger part of said tubes extending outside of said body for conducting air into the tubular I body. to mix with the exhaust gases, the intake tubes being tapered in shape and positioned with their larger ends outside of the body and facing in the same direction, thereby to conduct air into the tubular body.

9. In combination with the exhaust tail pipe of an internal combustion engine or the like, comprising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body,

the larger part of said tubes extending outside of said body for conducting air into the tubular body to mix with the exhaust gases, said intake tubes being assembled about the tubular body obliquely with respect to the length or the body and their larger ends outside of the body and in advance of one another;

10. In combination with the exhaust tail pipe of an internal combustion engine or the like, comprising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body, the larger part of said tubes extending outside of said body for conducting air into the tubularv gases is produced.

11. In combination with the exhaust tail pipe of an internal combustion engine or the like, comprising a tubular body having a substantially straight through central passage therethrough, and a plurality of flaring air intake tubes assembled about the side walls of said tubular body, the larger part of said tubes extending outside of said body for conducting air into the tubular body to mix with the exhaust gases, said intake tubes being assembled about the outside wall of the body with their smaller ends penetrating beneath the outside wall of the body and terminating closely adjacent the inside thereof and slightly in advance of one another, the tubes being angularly positioned with respect to the length of the body and slightly tangential thereby to produce a whirling action on the escaping gases.

12. An attachment for the exhaust pipe of automobile engines, comprising a tubular body member having a substantially straight central passage therethrough, means for attaching said body member to the end of the exhaust pipe, and a flaring air intake member mounted on the outside wall of said tube having its larger end outside of said tube and facing in the direction of travel and its smaller end coacting with the tubular member, said flaring member providing a path of travel of the air entering said flaring intake member oblique with respect to the axis of the tubular body member whereby the inrushing air produces a whirling action on the exhaust gases passing through the body member entering said flaring intake member being oblique with respect to the axis of the tubular body whereby the inrushing air produces a better whirling action.

AMMIEL F. DECKER. 

